The search for anonymity, which is one of the main attractions for the use of certain cryptocurrencies, is constantly fought, including by the tax authority. When it comes to cryptocurrencies and tax, I didn't know there was a problem? Why should a certain country tax you for crypto profits that aren't regulated by a bank or a specific country?
When it come to the issue of tax, its not about whether you operate in a regulated environment, whether you earn salary or you ply your trade under the bridge. It also does not matter whether you are an employee or you receive money from investment what matters to government is that you are making profit and that profit should be taxed as long as you enjoy public goods directly or indirectly.
Government with all its machinery will always find a way and they don't necessarily have to unravel the anonymity as they have other means they can track whatever inflow an individual is getting and in this era of cashless environment, it cannot be any easier.